"obama is the best gun salesman since bill clinton. every too many a liberal opens his mouth and says something stupid about guns, i sell a gazillion of them." need further proof? one iowa reporter went inside a des moines gun shop. >> the most popular is the a.r.-15, one of the weapons used in the sandy hook shooting. >> two days before christmas i maybe have 30 of these. and i had ten in my safes. and now i have zero. >> i'm joined by los angeles mayor antonio villaraigosa. welcome to the show, mr. mayor. >> michael, thank you for having me on. happy holidays to you. >> the same to you, my friend. does the uptick in gun sales surprise you in any way? >> no. i think we've seen this happen before. you've heard one of the people interviewed saying that it happened in the 1990s, when bill clinton was talking about and trying to do something about gun violence and responsible gun laws. you see it happening again after sandy hook. after the two firefighters who were assassinated just the other day and two police officers who were killed on